(19)

(11)

EP 3 442 698 A1

(12)

(43) Date of publication: 20.02.2019 Bulletin 2019/08 (21) Application number: 17715989.4 (22) Date of filing: 30.03.2017

(51) International Patent Classification (IPC):  B01J 19/12(2006.01) C10B 19/00(2006.01) C10B 53/06(2006.01) (86) International application number: PCT/GB2017/050898 (87) International publication number: WO 2017/178793 (19.10.2017 Gazette 2017/42)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 13.04.2016 GB 201606403 (71) Applicant: Nov Downhole Eurasia Limited Gloucestershire GL10 3RQ (GB)	(72) Inventors: BURNETT, George Aberdeen AB10 7JR (GB) BRADLEY, Mike Chatham Maritime Kent ME4 4TB (GB) ROBINSON, John Nottingham NG7 2RD (GB) (74) Representative: Rankin, Douglas  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)